Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Dumtah, Tulare Co., California, USA

Oldest recorded age at locality: 483
Youngest recorded age at locality: 190.5

mindat Locality ID: 252774
mindat URL: http://www.mindat.org/loc-252774.html

Tectonic Settings:

Total number of sublocalities beneath "Dumtah, Tulare Co., California, USA": 5
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Baty Mine
Baumann Prospect (Bauman Ranch)
Dumont Magnesite Mine
Gill Mine
Hamilton Mine (Hamilton Copper Prospect)

Latitude: 36°17'39"N
Longitude: 119°1'57"W
Decimal Degree (lat, lon): 36.294166666667,-119.0325

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Amorphous	Apatite	Apophyllite	Aragonite	Baryte	Benitoite	Calcite	Chalcopyrite	Epidote	Feldspar
Gillespite	Malachite	Margarosanite	Melilite	Nickeline	None	Not in a structural group	Pyrite	Pyroxene	Quartz
Rhodesite	Scheelite	Spinel	Titanite	Wollastonite

Alforsite ()*	Azurite ()*	Baryte ()*	Bazirite ()*	Benitoite ()*
Calcite ()*	Celsian ()*	Chalcopyrite ()*	Chromite ()*	Diopside ()*
Ekanite ()*	Fresnoite ()*	Gillespite ()*	Hydroxyapophyllite-(K) ()*	Krauskopfite ()*
Macdonaldite ()*	Magnesite ()*	Malachite ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Sanbornite ()*	Scheelite ()*	Titanite ()*	Titantaramellite ()*
Walstromite ()*	Witherite ()*	Wollastonite ()*	Zoisite ()*

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B Ba C Ca Cl Cr Cu F Fe H K Mg O P S Si Th Ti W Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Apatite Apophyllite Aragonite Baryte Benitoite Calcite Chalcopyrite Epidote Feldspar
Gillespite Malachite Margarosanite Melilite Nickeline None Not in a structural group Pyrite Pyroxene Quartz
Rhodesite Scheelite Spinel Titanite Wollastonite

29 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Alforsite ()*	Apatite	Ba₅(PO₄)₃Cl			1	182341	5
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	182344	5509
Baryte ()*	Baryte	Ba(SO₄)			1	182341	11547
Bazirite ()*	Benitoite	BaZrSi₃O₉			1	182341	11
Benitoite ()*	Benitoite	BaTiSi₃O₉			1	182341	20
Calcite ()*	Calcite	Ca(CO₃)			1	182341	27770
Celsian ()*	Feldspar	Ba(Al₂Si₂O₈)			1	182341	100
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			1	182344	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	483	483	1	182343	3902
Diopside ()*	Pyroxene	CaMgSi₂O₆			1	182341	4135
Ekanite ()*	Amorphous	Ca₂ThSi₈O₂₀			1	182341	16
Fresnoite ()*	Melilite	Ba₂TiO(Si₂O₇)			1	182341	17
Gillespite ()*	Gillespite	BaFe²⁺Si₄O₁₀			1	182341	9
Hydroxyapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀(OH,F)·8H₂O			1	182341	85
Krauskopfite ()*	None	BaSi₂O₅·3H₂O			1	182341	6
Macdonaldite ()*	Rhodesite	BaCa₄Si₁₆O₃₆(OH)₂·10H₂O			1	182341	5
Magnesite ()*	Calcite	Mg(CO₃)			1	182342	1487
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	182344	12537
Pyrite ()*	Pyrite	FeS₂			1	182341	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈			2	182341,182344	9056
Quartz ()*	Quartz	SiO₂			2	182340,182341	61156
Sanbornite ()*	None	BaSi₂O₅			1	182341	13
Scheelite ()*	Scheelite	Ca(WO₄)			2	182340,182341	4894
Titanite ()*	Titanite	CaTi(SiO₄)O			1	182341	4899
Titantaramellite ()*	None	Ba₄(Ti,Fe³⁺,Mg)₄(O,OH)₂[B₂Si₈O₂₇]Cl_x			1	182341	10
Walstromite ()*	Margarosanite	BaCa₂Si₃O₉			1	182341	8
Witherite ()*	Aragonite	Ba(CO₃)			1	182341	251
Wollastonite ()*	Wollastonite	CaSiO₃			1	182341	1247
Zoisite ()*	Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)			1	182341	1025

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Dated Mineral	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00054	483	483	Lower Ordovician (483±21 Ma Sm-Nd whole rock and mineral)				Cr	252903	Gill Mine, Dumtah, Tulare Co., California, USA	Gill	Moiser et al. (2012)	USGSSIR2012_5157
USGS-U-Th-Pb-00600_206_238	190.5	190.5	190.5	206_238	zircon	Zircon		252903	Gill Mine, Dumtah, Tulare Co., California, USA		USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00600_207_206	224	224	224	207_206	zircon	Zircon		252903	Gill Mine, Dumtah, Tulare Co., California, USA		USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00600_207_235	192.4	192.4	192.4	207_235	zircon	Zircon		252903	Gill Mine, Dumtah, Tulare Co., California, USA		USGS-U-Th-Pb	USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...